(Q_compatibility_of): New variable.

(put_char_composition): Use XCAR/XCDR instead of Fcar/Fcdr if an
object is proved to be a cons cell; return `<-compatibility' if the
first element of argument `value' is `compat'.
(Fput_char_attribute): Eliminate the first value if
`put_char_composition' returns `<-compatibility'.
(Fsave_char_attribute_table): Use `Fchar_refs_simplify_char_specs' for
`<-compatibility'.
(syms_of_chartab): Add new symbol `<-compatibility'.

diff --git a/src/chartab.c b/src/chartab.c
index afd436d..6a56075 100644 (file)
--- a/src/chartab.c
+++ b/src/chartab.c
@@ -1132,6 +1132,7 @@ make_char_id_table (Lisp_Object initval)
 Lisp_Object Qcomposition;
 Lisp_Object Qmap_decomposition;
 Lisp_Object Q_canonical;
+Lisp_Object Q_compatibility_of;
 Lisp_Object Q_decomposition;
 Lisp_Object Q_identical;
 Lisp_Object Q_identical_from;
@@ -3395,12 +3396,12 @@ put_char_composition (Lisp_Object character, Lisp_Object value)
     signal_simple_error ("Invalid value for =decomposition",
                         value);
 
-  if (CONSP (Fcdr (value)))
+  if (CONSP (XCDR (value)))
     {
-      if (NILP (Fcdr (Fcdr (value))))
+      if (NILP (Fcdr (XCDR (value))))
        {
-         Lisp_Object base = Fcar (value);
-         Lisp_Object modifier = Fcar (Fcdr (value));
+         Lisp_Object base = XCAR (value);
+         Lisp_Object modifier = XCAR (XCDR (value));
 
          if (INTP (base))
            {
@@ -3410,7 +3411,7 @@ put_char_composition (Lisp_Object character, Lisp_Object value)
          if (INTP (modifier))
            {
              modifier = make_char (XINT (modifier));
-             Fsetcar (Fcdr (value), modifier);
+             Fsetcar (XCDR (value), modifier);
            }
          if (CHARP (base))
            {
@@ -3426,6 +3427,8 @@ put_char_composition (Lisp_Object character, Lisp_Object value)
              else
                Fsetcdr (ret, character);
            }
+         else if (EQ (base, Qcompat))
+           return Q_compatibility_of;
        }
     }
   else
@@ -3495,6 +3498,8 @@ Store CHARACTER's ATTRIBUTE with VALUE.
            EQ (attribute, Q_decomposition) )
     {
       attribute = put_char_composition (character, value);
+      if (EQ (attribute, Q_compatibility_of))
+       value = XCDR (value);
     }
   else if (EQ (attribute, Qto_ucs))
     {
@@ -3522,11 +3527,14 @@ Store CHARACTER's ATTRIBUTE with VALUE.
        EQ (attribute, Q_identical)             ||
        EQ (attribute, Q_identical_from)                ||
        EQ (attribute, Q_canonical)             ||
+       EQ (attribute, Q_compatibility_of)      ||
        EQ (attribute, Q_component)             ||
        EQ (attribute, Q_component_of)          ||
        !NILP (Fstring_match
              (build_string ("^\\(<-\\|->\\)\\("
-                            "fullwidth\\|halfwidth"
+                            "canonical"
+                            "\\|compatibility"
+                            "\\|fullwidth\\|halfwidth"
                             "\\|simplified\\|vulgar\\|wrong"
                             "\\|same\\|original\\|ancient"
                             "\\|Oracle-Bones\\)[^*]*$"),
@@ -3871,6 +3879,7 @@ Save values of ATTRIBUTE into database file.
                EQ (attribute, Q_identical)             ||
                EQ (attribute, Q_identical_from)        ||
                EQ (attribute, Q_canonical)             ||
+               EQ (attribute, Q_compatibility_of)      ||
                !NILP (Fstring_match
                       (build_string ("^\\(<-\\|->\\)\\(simplified"
                                      "\\|same\\|vulgar\\|wrong"
@@ -4654,6 +4663,7 @@ syms_of_chartab (void)
   defsymbol (&Qcomposition,            "composition");
   defsymbol (&Qmap_decomposition,      "=decomposition");
   defsymbol (&Q_canonical,             "->canonical");
+  defsymbol (&Q_compatibility_of,      "<-compatibility");
   defsymbol (&Q_decomposition,         "->decomposition");
   defsymbol (&Qcompat,                 "compat");
   defsymbol (&Qisolated,               "isolated");